Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f7c0060edffa23…

MALICIOUS

PDF

39.4 KB Created: 2020-08-19 13:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 81ee5198866b8cc075a6585d15d9007a SHA-1: 5381d819cb81a49937cb384899ad9037299881e6 SHA-256: 67f7c0060edffa2316f88bae925e882b8226a85e57cc28c4dbe978976af1ae81
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, including one to a redirector infrastructure associated with malicious activity. The document body and heuristics indicate a lure for downloading 'Adobe Acrobat Reader 2019 free', which is a common phishing tactic. The presence of a link farm suggests an attempt to distribute potentially malicious files or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=adobe+acrobat+reader+2019+free In PDF document text
    • http://files.skylineelectricmn.com/uploads/1/3/2/6/132682134/rasokisaxiwum_nivawosanofiz.pdfIn PDF document text
    • http://tidowij.jonathanrudy.com/uploads/1/3/1/8/131857152/3326981.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5737/9488/files/21518180512.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/306660031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gowaluzefep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/ansys_workbench_book_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1966/3522/files/autumn_leaves_piano_sheet_music_eva_cassidy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6737/5770/files/zupexotavidowudasanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7373/2768/files/32400650478.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B3D 5416 bytes
SHA-256: c6c2b7f69dc4ca5e930289085ecb90e76644e8e1ca0bf1b8967bccd3464b3f8c
font_01_sfnt_off00006dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBC 10388 bytes
SHA-256: e96a4979ea6f60b405d424d7155c30429361021f9907cdb55ef6adf97a361b8a